Senior Windows Linux Systems Engineer jobs

Huntsville, Alabama

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Today

The Contested Autonomy & Navigation Branch of the Leidos Innovations Center provides cutting-edge navigation for customers who can't rely on GPS alone, and we need your help in the Rocket City (Huntsville, AL)! This position offers both analytic and hands-on tasks, including development, simulation, analysis, and field testing of navigation algorithms. We perform research, development, and advanced prototyping for DARPA, NASA, Air Force Research Laboratory, Office of Naval Research, and Army Com

Full-time

USD 107,900.00 - 195,050.00 per year

Sr. Associate, Software Engineering

Fort Wayne, Indiana

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Today

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers? mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trust

Full-time

Senior Systems Administrator

Huntsville, Alabama

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Today

Job ID: 2614937 Location: Huntsville, AL, US Date Posted: 2026-07-27 Category: Information Technology Subcategory: Sys Administrator Schedule: Full-Time Shift: Day Job Travel: Yes - 50% of the time Minimum Clearance Required: Secret Clearance Level Must Be Able to Obtain: TS/SCI Potential for Remote Work: ORA_ON_SITE Description SAIC is seeking a Senior Systems Administrator located in Huntsville, AL to support USPACOM to enhance and upgrade a myriad of applications and services, in an

Full-time

Principal Senior Vulnerability Research Engineer (Onsite)

Annapolis, Maryland

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Today

Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers' most demanding challenges. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization. Nightwing brings disruptive technologies, agility, and competitive offerings to customers in th

Full-time

USD 122,000.00 - 253,000.00 per year

Senior Vulnerability Research / Reverse Engineer

Remote

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Today

In a world of possibilities, pursue one with endless opportunities. Imagine Next! At Parsons, you can imagine a career where you thrive, work with exceptional people, and be yourself. Guided by our leadership vision of valuing people, embracing agility, and fostering growth, we cultivate an innovative culture that empowers you to achieve your full potential. Unleash your talent and redefine what's possible. Job Description: Parsons is seeking a Vulnerability Research / Reverse Engineer to join

Full-time

USD 148,300.00 - 266,900.00 per year

Senior Systems Administrator

St. Louis, Missouri

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Today

Job Description: Are you passionate about solving complex technical challenges in support of national security? Leidos is seeking a Senior Systems Administrator to join our high-performing team on the Chinook Program, supporting our Intelligence Community customer. In this mission-critical role, you'll be at the forefront of maintaining and enhancing the application ensuring the reliability, security, and performance of systems that directly enable intelligence operations. As a trusted technic

Full-time

USD 92,300.00 - 166,850.00 per year

Senior Systems Administrator

Colorado Springs, Colorado

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Today

Why This Role MattersAt Bluestaq, mission success depends on systems that are secure, reliable, and always ready. As a Senior Systems Administrator, you'll keep critical infrastructure running - maintaining, monitoring, and troubleshooting the applications and systems our teams and customers depend on around the clock. Your work directly strengthens the technical backbone behind Bluestaq's most important missions. What You'll Own: Maintain and support the integrity of system networks through te

Full-time

USD 90,000.00 - 120,000.00 per year

Sr. IT Systems Administrator (Top Secret Clearance)

Washington, District of Columbia

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Today

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SR. IT SYSTEMS ADMINISTRATOR (TOP SECRET CLEARANCE) SpaceX is looking for a Sr. Systems Administrator with deep knowledge and broad experience across Microsoft-based technologies, in addition to broader experience and

Full-time

USD 95,000.00 - 120,000.00 per year

Senior Cloud/DevOps Engineer (AWS)

Westborough, Massachusetts

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Today

Full Spectrum partners with leading companies in MedTech to develop cutting-edge software for medical devices. With projects focused on embedded systems, mobile apps, robotics, engineers at Full Spectrum love the challenge of working with clients on products that have a meaningful impact. Working across different client projects with a wide range of technologies, a career at Full Spectrum offers both technical and professional growth opportunities. Senior Cloud/DevOps Engineer (AWS) The Senior C

Full-time

USD 105,000.00 - 165,000.00 per year

Sr. Technical Support Engineer

Florida

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Today

Our Purpose At SentinelOne, we are driven by a clear purpose: to give the advantage to those who secure our future. As AI reshapes how organizations build, operate, and innovate, the responsibility to protect them becomes more critical than ever. When you join SentinelOne, your work helps protect global enterprises, critical infrastructure, and the technologies shaping tomorrow. If you are motivated by meaningful challenges and want your impact to be real, measurable, and global, you will find

Full-time

USD 92,800.00 - 115,000.00 per year

Data Scientist, Principal (Senior Software Developer; Systems Software)

Columbia, Maryland

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Today

Proficient in Python Experience with Docker and Kubernetes Experience with end-to-end workflows/projects 3+ years of Defensive Cyber Operations experience 3+ years of Machine Learning techniques and statistical model evaluation Active TS/SCI w/ polygraph required for consideration Bachelor's degree in relevant field and 8 years of experience; an advanced degree will be considered in lieu of years of experience Desired: Master's degree in relevant field and 4 years of experience Demonstrated ex

Full-time

Senior Applications Administrator

Richmond, Virginia

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Today

Work Schedule Standard (Mon-Fri) Environmental Conditions Able to lift 40 lbs. without assistance, Office, Some degree of PPE (Personal Protective Equipment) required (safety glasses, gowning, gloves, lab coat, ear plugs etc.) Job Description At Thermo Fisher Scientific team, you'll discover impactful work, innovative thinking and a culture dedicated to working the right way, for the right reasons - with the customer always top of mind. The work we do matters, like helping customers find cure

Full-time

USD 75,800.00 - 113,670.00 per year

Software Developer Productivity Engineer | HPC | Experienced Hire

Pennsylvania

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19d ago

Overview Susquehanna is looking for an experienced Software Build Engineer with deep knowledge of C++ build tools and a passion for Developer Productivity. The build tools are used for building trading desk's low latency, high performance infrastructure and applications. If you join us, you might be: Working on design, develop and maintain build tools, utilities and infrastructure utilized to support software development lifecycle. Working with our developers and systems engineers to ensure all

Full-time

Senior Linux Administrator

Pensacola, Florida

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Today

Company Overview: At ValidaTek, we modernize and optimize IT services to solve some of the most critical challenges facing federal civilian and defense agencies. From customers to partners to top-talent employees, ValidaTek puts people first, empowering them to exceed expectations and transform government organizations. Our success starts and ends with our people, so we built a company where great people can do great things, with the resources and autonomy to make decisions that transform organ

Full-time

(626) Information System Security Specialist III

Philadelphia, Pennsylvania

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Today

Company Summary Arlo Solutions (Arlo) is an information technology consulting services company that specializes in delivering technology solutions. Our reputation reflects the high quality of the talented Arlo Solutions team and the consultants working in partnership with our customers. Our mission is to understand and meet the needs of both our customers and consultants by delivering quality, value-added solutions. Our solutions are designed and managed to not only reduce costs, but to improve

Full-time

Senior System Administrator

Fort Meade, Maryland

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Today

Assured Information Security (AIS) has an opening for a Senior System Administrator. This is an onsite position located at Ft. Meade and requires a TS/SCI w/FS Poly. This position is responsible for supporting the implementation, troubleshooting, and maintenance of IT systems. This role manages system infrastructure and related processes, including daily operations, monitoring, and issue resolution across client/server, storage, network, and mobile environments. The role provides Tier 1 and Tie

Full-time

USD 150,000.00 - 175,000.00 per year

Senior Associate, Image Science Engineering (Rochester, NY)

Rochester, New York

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Today

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers' mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trus

Full-time

USD 70,500.00 - 130,500.00 per year

Lead Systems Administrator

Vienna, Virginia

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Today

NTC OVERVIEW: We are seeking a Lead Systems Administrator to join our team. Working at NT Concepts means that you are part of an innovative, agile company dedicated to solving the most critical challenges in National Security. We're looking for the best and the brightest to join us in supporting this mission. If meaningful work, initiative, creativity, and continuous self-improvement are important to your career, join our growing team and discover What's Next for you. Mission Focus: NT Concepts

Full-time

USD 120,336.00 - 180,504.00 per year

Senior Platform Engineer

Los Angeles, California

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Today

Senior Platform Engineer Lawrence Harvey are working exclusively with a well-funded, venture-backed aerospace technology company is seeking a Senior Platform Engineer to help build the infrastructure that powers mission-critical simulation and testing environments for next-generation autonomous systems. Working as part of a highly collaborative engineering team, you'll design and build the internal platform that enables developers to rapidly develop, deploy, and validate software running on com

Full-time

$140k - 201k per year

Senior Security Engineer

No location provided

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Today

Location Details: At GoDaddy the future of work looks different for each team. Some teams work in the office full-time, others have a hybrid arrangement (they work remotely some days and in the office some days) and some work entirely remotely. This is a remote position, so you'll be working remotely from your home. You may occasionally visit a GoDaddy office to meet with your team for events or meetings. This position is not eligible to be performed in Alaska, Mississippi, North Dakota, or th

Full-time

USD 154,000.00 - 231,000.00 per year